diff options
Diffstat (limited to 'activesupport/test/share_lock_test.rb')
-rw-r--r-- | activesupport/test/share_lock_test.rb | 150 |
1 files changed, 74 insertions, 76 deletions
diff --git a/activesupport/test/share_lock_test.rb b/activesupport/test/share_lock_test.rb index 42fd5eefc1..a40c813fe3 100644 --- a/activesupport/test/share_lock_test.rb +++ b/activesupport/test/share_lock_test.rb @@ -11,38 +11,38 @@ class ShareLockTest < ActiveSupport::TestCase def test_reentrancy thread = Thread.new do - @lock.sharing { @lock.sharing {} } - @lock.exclusive { @lock.exclusive {} } + @lock.sharing { @lock.sharing { } } + @lock.exclusive { @lock.exclusive { } } end assert_threads_not_stuck thread end def test_sharing_doesnt_block with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_latch| - assert_threads_not_stuck(Thread.new { @lock.sharing {} }) + assert_threads_not_stuck(Thread.new { @lock.sharing { } }) end end def test_sharing_blocks_exclusive with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| @lock.exclusive(no_wait: true) { flunk } # polling should fail - exclusive_thread = Thread.new { @lock.exclusive {} } + exclusive_thread = Thread.new { @lock.exclusive { } } assert_threads_stuck_but_releasable_by_latch exclusive_thread, sharing_thread_release_latch end end def test_exclusive_blocks_sharing with_thread_waiting_in_lock_section(:exclusive) do |exclusive_thread_release_latch| - sharing_thread = Thread.new { @lock.sharing {} } + sharing_thread = Thread.new { @lock.sharing { } } assert_threads_stuck_but_releasable_by_latch sharing_thread, exclusive_thread_release_latch end end - def test_multiple_exlusives_are_able_to_progress + def test_multiple_exclusives_are_able_to_progress with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| exclusive_threads = (1..2).map do Thread.new do - @lock.exclusive {} + @lock.exclusive { } end end @@ -53,7 +53,7 @@ class ShareLockTest < ActiveSupport::TestCase def test_sharing_is_upgradeable_to_exclusive upgrading_thread = Thread.new do @lock.sharing do - @lock.exclusive {} + @lock.exclusive { } end end assert_threads_not_stuck upgrading_thread @@ -66,7 +66,7 @@ class ShareLockTest < ActiveSupport::TestCase upgrading_thread = Thread.new do @lock.sharing do in_sharing.count_down - @lock.exclusive {} + @lock.exclusive { } end end @@ -81,7 +81,7 @@ class ShareLockTest < ActiveSupport::TestCase exclusive_threads = (1..2).map do Thread.new do @lock.send(use_upgrading ? :sharing : :tap) do - @lock.exclusive(purpose: :load, compatible: [:load, :unload]) {} + @lock.exclusive(purpose: :load, compatible: [:load, :unload]) { } end end end @@ -95,7 +95,7 @@ class ShareLockTest < ActiveSupport::TestCase with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| thread = Thread.new do @lock.sharing do - @lock.exclusive {} + @lock.exclusive { } end end @@ -105,7 +105,7 @@ class ShareLockTest < ActiveSupport::TestCase sharing_thread_release_latch.count_down thread = Thread.new do - @lock.exclusive {} + @lock.exclusive { } end assert_threads_not_stuck thread @@ -115,68 +115,66 @@ class ShareLockTest < ActiveSupport::TestCase def test_exclusive_conflicting_purpose [true, false].each do |use_upgrading| with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| - begin - together = Concurrent::CyclicBarrier.new(2) - conflicting_exclusive_threads = [ - Thread.new do - @lock.send(use_upgrading ? :sharing : :tap) do - together.wait - @lock.exclusive(purpose: :red, compatible: [:green, :purple]) {} - end - end, - Thread.new do - @lock.send(use_upgrading ? :sharing : :tap) do - together.wait - @lock.exclusive(purpose: :blue, compatible: [:green]) {} - end + together = Concurrent::CyclicBarrier.new(2) + conflicting_exclusive_threads = [ + Thread.new do + @lock.send(use_upgrading ? :sharing : :tap) do + together.wait + @lock.exclusive(purpose: :red, compatible: [:green, :purple]) { } + end + end, + Thread.new do + @lock.send(use_upgrading ? :sharing : :tap) do + together.wait + @lock.exclusive(purpose: :blue, compatible: [:green]) { } end - ] - - assert_threads_stuck conflicting_exclusive_threads # wait for threads to get into their respective `exclusive {}` blocks - - # This thread will be stuck as long as any other thread is in - # a sharing block. While it's blocked, it holds no lock, so it - # doesn't interfere with any other attempts. - no_purpose_thread = Thread.new do - @lock.exclusive {} end - assert_threads_stuck no_purpose_thread + ] - # This thread is compatible with both of the "primary" - # attempts above. It's initially stuck on the outer share - # lock, but as soon as that's released, it can run -- - # regardless of whether those threads hold share locks. - compatible_thread = Thread.new do - @lock.exclusive(purpose: :green, compatible: []) {} - end - assert_threads_stuck compatible_thread + assert_threads_stuck conflicting_exclusive_threads # wait for threads to get into their respective `exclusive {}` blocks - assert_threads_stuck conflicting_exclusive_threads + # This thread will be stuck as long as any other thread is in + # a sharing block. While it's blocked, it holds no lock, so it + # doesn't interfere with any other attempts. + no_purpose_thread = Thread.new do + @lock.exclusive { } + end + assert_threads_stuck no_purpose_thread + + # This thread is compatible with both of the "primary" + # attempts above. It's initially stuck on the outer share + # lock, but as soon as that's released, it can run -- + # regardless of whether those threads hold share locks. + compatible_thread = Thread.new do + @lock.exclusive(purpose: :green, compatible: []) { } + end + assert_threads_stuck compatible_thread - sharing_thread_release_latch.count_down + assert_threads_stuck conflicting_exclusive_threads - assert_threads_not_stuck compatible_thread # compatible thread is now able to squeak through + sharing_thread_release_latch.count_down - if use_upgrading - # The "primary" threads both each hold a share lock, and are - # mutually incompatible; they're still stuck. - assert_threads_stuck conflicting_exclusive_threads + assert_threads_not_stuck compatible_thread # compatible thread is now able to squeak through - # The thread without a specified purpose is also stuck; it's - # not compatible with anything. - assert_threads_stuck no_purpose_thread - else - # As the primaries didn't hold a share lock, as soon as the - # outer one was released, all the exclusive locks are free - # to be acquired in turn. + if use_upgrading + # The "primary" threads both each hold a share lock, and are + # mutually incompatible; they're still stuck. + assert_threads_stuck conflicting_exclusive_threads - assert_threads_not_stuck conflicting_exclusive_threads - assert_threads_not_stuck no_purpose_thread - end - ensure - conflicting_exclusive_threads.each(&:kill) - no_purpose_thread.kill + # The thread without a specified purpose is also stuck; it's + # not compatible with anything. + assert_threads_stuck no_purpose_thread + else + # As the primaries didn't hold a share lock, as soon as the + # outer one was released, all the exclusive locks are free + # to be acquired in turn. + + assert_threads_not_stuck conflicting_exclusive_threads + assert_threads_not_stuck no_purpose_thread end + ensure + conflicting_exclusive_threads.each(&:kill) + no_purpose_thread.kill end end end @@ -231,7 +229,7 @@ class ShareLockTest < ActiveSupport::TestCase assert_threads_stuck waiting_exclusive late_share_attempt = Thread.new do - @lock.sharing {} + @lock.sharing { } end assert_threads_stuck late_share_attempt @@ -252,14 +250,14 @@ class ShareLockTest < ActiveSupport::TestCase @lock.sharing do ready.wait attempt_reentrancy.wait - @lock.sharing {} + @lock.sharing { } end end exclusive = Thread.new do @lock.sharing do ready.wait - @lock.exclusive {} + @lock.exclusive { } end end @@ -280,7 +278,7 @@ class ShareLockTest < ActiveSupport::TestCase Thread.new do @lock.sharing do ready.wait - @lock.exclusive(purpose: :x, compatible: [:x], after_compatible: [:x]) {} + @lock.exclusive(purpose: :x, compatible: [:x], after_compatible: [:x]) { } done.wait end end @@ -297,7 +295,7 @@ class ShareLockTest < ActiveSupport::TestCase Thread.new do @lock.sharing do ready.wait - @lock.exclusive(purpose: :x) {} + @lock.exclusive(purpose: :x) { } done.wait end end, @@ -323,7 +321,7 @@ class ShareLockTest < ActiveSupport::TestCase Thread.new do @lock.sharing do ready.wait - @lock.exclusive(purpose: :x) {} + @lock.exclusive(purpose: :x) { } done.wait end end, @@ -352,7 +350,7 @@ class ShareLockTest < ActiveSupport::TestCase Thread.new do @lock.sharing do ready.wait - @lock.exclusive(purpose: :x) {} + @lock.exclusive(purpose: :x) { } done.wait end end, @@ -386,7 +384,7 @@ class ShareLockTest < ActiveSupport::TestCase incompatible_thread = Thread.new do @lock.sharing do ready.wait - @lock.exclusive(purpose: :x) {} + @lock.exclusive(purpose: :x) { } end end @@ -418,7 +416,7 @@ class ShareLockTest < ActiveSupport::TestCase incompatible_thread = Thread.new do ready.wait - @lock.exclusive(purpose: :z) {} + @lock.exclusive(purpose: :z) { } end recursive_yield_shares_thread = Thread.new do @@ -427,7 +425,7 @@ class ShareLockTest < ActiveSupport::TestCase @lock.yield_shares(compatible: [:y]) do do_nesting.wait @lock.sharing do - @lock.yield_shares(compatible: [:x, :y]) {} + @lock.yield_shares(compatible: [:x, :y]) { } end after_nesting.wait end @@ -439,12 +437,12 @@ class ShareLockTest < ActiveSupport::TestCase assert_threads_stuck incompatible_thread compatible_thread = Thread.new do - @lock.exclusive(purpose: :y) {} + @lock.exclusive(purpose: :y) { } end assert_threads_not_stuck compatible_thread post_nesting_incompatible_thread = Thread.new do - @lock.exclusive(purpose: :x) {} + @lock.exclusive(purpose: :x) { } end assert_threads_stuck post_nesting_incompatible_thread |